Defined Contribution Plan Requisite Service Period

No definition available.

Name:	cvcy_DefinedContributionPlanRequisiteServicePeriod
Namespace Prefix:	cvcy_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

[Line Items] for Schedule of Defined Contribution Plans Disclosures [Table]

No definition available.

Name:	cvcy_ScheduleOfDefinedContributionPlansDisclosuresLineItems
Namespace Prefix:	cvcy_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Amount of discretionary contributions made by an employer to a defined contribution plan.

No definition available.

Name:	us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

No definition available.

Name:	us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Percentage employer matches of the employee's percentage contribution matched.

No definition available.

Name:	us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Percentage of employer's matching contributions to a defined contribution plan that vests in a given year.

No definition available.

Name:	us-gaap_DefinedContributionPlanEmployersMatchingContributionAnnualVestingPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_RetirementPlanNameAxis=cvcy_ProfitSharingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
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Employee Benefits - 401(k) and profit sharing plan (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
401(k) plan
Schedule of Defined Contribution Plans Disclosures [Line Items]
Requisite service period	1 month
Employer contribution amount	$ 686	$ 604	$ 585
Profit sharing plan
Schedule of Defined Contribution Plans Disclosures [Line Items]
Requisite service period	2 years
Percentage vesting annually	100.00%
Employer contribution amount	$ 600	$ 380	$ 270
Minimum \| 401(k) plan
Schedule of Defined Contribution Plans Disclosures [Line Items]
Employer matching of employee contributions, percentage	50.00%
Employer matching contribution, percentage of compensation	3.00%
Maximum \| 401(k) plan
Schedule of Defined Contribution Plans Disclosures [Line Items]
Employer matching of employee contributions, percentage	100.00%
Employer matching contribution, percentage of compensation	5.00%